Saw-sharpening machine



(No Model.) 3 Sheets-Sheet 1.

R..BARKER. SAW SHARPBNING MACHINE.

No. 542,548. Patented July 9, 1895.

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R. F. BARKER.

SAW SHARPENING MAGHINB. No. 542,548. Patented July 9, 1895.

Witnesses:

Attorney y (No Mdel.) s sheetssheet a R. P. BAKKER.

SAW SHARPBNING MACHINE. No. 542,548.4 Patented July 9, 1895.

Inventor.

Attorney?,

UNITED STATEs ATENT OFFICE.

RUBEN F. BARKER, OF MARINETTE, WISCONSIN.

SAW-SHARPENING MACHINE.

sPEcIFIcArrON forming part of Letters Patent No. 542,548, dated July e,1895.

v.Application led February 4, 1895. Serial No. 537 ,292. (No model.)

nette, in the county of Marinette and State of Wisconsin, have inventedcertain new and useful Improvements in Saw-Sharpening Machines; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

My invention relates to improvements for sharpening saw-teeth, and moreespecially the teeth of band-saws; and `the said invention consists ofthe certain novel combinations, constructions, and arrangements ofparts, hereinafter described and claimed.

Reference is had to the accompanying drawings, in which the same partsare indicated by the same letters throughout the several views.

Figure 1 represents a side elevation of my improved saw-sharpeningmachine in operation on aband-saw. l Fig. 2 represents an end view ofthe said machine, partly in section, along the line xof Fig. 3 andlooking to the left in the said figure. Fig. 3 represents a plan View ofthe' machine shown in Figs. l and 2. Fig. 4. represents an enlargedsectional View of one of the teeth of a band-saw after it has beenswaged down before being sharpened, and Fig. 5 represents a view of thesame tooth after it has been sharpened by my improved machine.

The devices shown in Figs. 4. and 5 are somewhat exaggerated, butrepresent the operation of my improved machine.

In the drawings, Arepresents the saw-blade provided with teeth a, whichteeth are ordinarily swaged down, forming shoulders a', which shouldersare ground away, as at a2, by my machine, leaving angular cutting-edges,as shown most clearly in Figs. 2 and 5.

B, O, and D represent three pairs of guiderollers between which thesaw-blade passes andby which itis held Iirmly in position. Theseguide-rollers are mounted in a frame E `and rotate in adjustablebearings e', held in the sliding blocks e, which are adjusted by meansof the screws e2, and thus the pairs of rollers may be made to bearirmly against a saw-blade of any thickness. The lower ends of theserollers are mounted in the strip F.2 and are adjusted by means of thescrews e3 which bear on the sleeves e4, as shown most clearly in Fig. 2.

lAbove the rollers C, which hold the sawblade rigidly between them,emery-wheels F are provided, with axes parallel to the sawblade', whichwheels are adjusted by means of the hand-wheel F3 and sliding block F2to bear upon the base of the sawtooth, as shown by the dotted lines inFig. 5. This block F2 is dovetailed beneath the guide e5, as shown mostclearly in Fig. l. Instead of the handwheel F3, adj usting-screws F4, asshown in Fig. 3, may be provided, if desired. Each of these emery-wheelsF is mounted on the same shaft with the pulley F,`Which is driven by thebelt G, passing over the pulley I-I on the driving-shaftH, which shaftis driven by means o f the pulley H0 or by any other suitable mechanism.Another pulley H2 is mounted on the driving-shaft, which is connected bymeans of the belt K with the pulley M, which pulley M drives the beveledpinion M', meshing in the beveled gear D', which is fast to the lowerend of one of the rollers D, which roller. carries the gear-wheel D2,meshing in the gear-Wheel DB on the other roller of the pair. Thus, bymeans of the belt K and 'the gearing j ust described, the rollers D arecaused to push the saw-blade ahead, feeding the same to theeinery-wheels F, which sharpen the teeth seratm.

In order to adjust the saw-blade to the proper height relative to theemery-Wheels F, a block P is provided, which is moved vertically bymeans of the screw Q and handwheel Q', as shown in Fig. l. The operationof the device is as follows: The saw-blade is inserted between therollers B, C, and D, and the'said rollers are adj usted ICO saw-teethare sharpened mechanically while the saw is also fed forwardmechanically, which is a greatsaving of time and manual labor. Again,the saw-teeth being hollowground present a sharp cutting-edge, which isbetter adapted to wear down sharp than the filed edges ordinarily foundin saws which have been sharpened by hand. These and the various otheradvantages of the herein described construction will readily suggestthemselves to any one skilled in the art.

It will be obvious that various modifications of the herein-describedapparatus might be made which could be used without departing from thespirit of my invention.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is-

1. In a machine for sharpening saw teeth, the combination with anupright frame and vertical guide rollers horizontally adjustable thereinand adapted to hold the saw blade between each pair; of a pair ofabrading wheels arranged one on either side of the saw blade, with theiraxes parallel with the longitudinal axis of the saw blade, and adaptedto cut into the sides of the saw teeth near the base thereof; means foradvancing and retiring said abrading wheels, and means for rotating saidabrading wheels simultaneously, and means also forrotatin g one pair ofsaid guide rollers, substantially as described.

2. In a machine for sharpening saw teeth, the combination with anupright frame, a pair of vertical feed rollers mounted therein near oneend thereof adjustable horizontally, and adapted to cause the saw bladeto move past the abrading wheels; pairs of vertical guide rollers, alsomounted in said frame and adjustable horizontally, each pair beingadapted to hold and guide the saw blade; of a pair of abradin g Wheelsarranged one on either side of the saw blade with their axes parallelwith the longitudinal axis of the saw blade and being adapted to cutinto the sides of the saw teeth near the base thereof on both sidessimultaneously; means for advancing and retiring said abrading wheels,and means for rotating said abrading wheels and said pair of feedrollers at a different speed, substantially as described.

3. In a machine for sharpening saw teeth, the combination with anupright frame, a pair of vertical feed rollers mounted therein near oneend thereof, adjustable horizontally and adapted to cause the saw bladeto move past the abrading wheels; pairs of vertical guide rollers alsomounted in said frame and adj ustable horizontally, each pair beingadapted to hold and guide the saw blade; of a pair of abrading wheelseach mounted upon a shaft journaled in a sliding block on either side ofsaid saw blade, having their axes parallel with the longitudinal axis ofthe saw blade, and being adapted to cut into the sides of the saw teethnear the base thereof on both sides simultaneously; a hand wheel andscrew mounted on either side of said frame for acl- Vancing and retiringsaid abrading wheels, and means for rotating said abrading wheels andsaid pair of feed rollers, substantially as described.

4. In a machine for sharpening saw teeth, the combination with anupright frame, a pair of vertical feed rollers mounted in said framenear one end thereof and adjustable horizontally; a bevel gear on thelower end of one of said rollers meshing with a bevel pinion mountedupon a shaft journaled in the lower part of said frame; a pulley on saidshaft, means for driving said pulley; gearing between said feed rollersat their lower ends; the said rollers being adapted to cause the sawblade to move past the abrading wheels when adjusted upon -the saw androtated; pairs of vertical guide rollers, also mounted in said frame andadjustable horizontally, and adapted to hold and guide the saw blade; ofa pair of abrading wheels arranged one on either side of the saw bladewith their axes parallelwith the longitudinal axis of the saw blade andbeing adapted to cut into the sides of the saw teeth near the basethereof on both sides simultaneously; and means for advancing andretiring said abrading wheels, substantially as described.

5. In amachine for sharpening saw teeth, the combination with an uprightframe, a pair of vertical feed rollers mounted therein near one endthereof and adjustable horizontally; a bevel gear on the lower end ofone of said rollers meshing with a bevel pinion mounted upon a shaftjournaled in the lower part of said frame; a pulley on said shaft, meansfor driving said pulley; gearing between said feed rollers at theirlower ends, the said rollers being adapted to cause the saw blade tomove past the abrading wheels when adjustedupon 'the saw and rotated;pairs of vertical guide rollers also mounted in said frame'andadjustable horizontally, and adapted to hold and guide the saw blade; ofa pair of abrading wheels each mounted upon a shaft journaled in asliding block on either side of said saw blade, having their axesparallel with the longitudinal axis of the saw blade, and being adaptedto cut into the sides of the saw teeth near the base thereof on bothsides simultaneously; a hand wheel and screw mounted on either side `ofsaid frame for advancing and retiring said abrading wheels, and meansfor rotating said abrading wheels, substantially as described.

6. In a machine for sharpening saw teeth, the combination with anupright frame, a pair of vertical feed rollers mounted therein near oneend thereof and adjustable horizontally; a bevel gear on the lower endof one of said rollers meshing with abevel pinion mounted upon 'a shaftjournaled in the lower part of said frame; a pulley on said shaft, meansfor driving said pulley; gearing between said feed rollers at theirlower ends for causing said rollers to rotate simultaneously but inopposite IOC IIO

directions; pairs of vertical guide rollers also mounted in said frameand adjustable horizontally; a hand wheel and screw carrying avertically adjustable block, mounted in the lower part of said frame,and adapted to support the lower edge of the saw blade; a pairofabrading Wheels each mounted upon a shaft journaled in a sliding blockon either side of said saw blade, having their axes parallel with thelongitudinal axis of the saw blade, and being adapted to cut into thesides of the saw teeth near the base thereof on either side of the sawblade; a hand Wheel RUBEN F. BAKKER. Witnesses:

E. C. EASTMAN, CHAs. H. DAVIS.

